Upright centrifugal flour-bolt



(No Model.) 2 Sheets -Sheet 1.

L. GATHMANN.

UPRIGHT GENTRIFUGAL FLOUR BOLT.

No. 319,695. Patented June 9, 1885.

N PEIERS. PhoiD-Ulhognplwr, Wnhingwn. D. I;

(No Model.) 2 SheetS- -Sheet 2.

' L. GATHMANN.

UPBIGHT OBNTRIPUGAL FLOUR BOLT. No. 319,695. Patented June 9, 17885.

Minn STATES Fries.

HATEENT UPRIGHT CENTRIFUGAL FLOUR-BOLT.

SPECIFICATION forming part of Letters Patent No. 319,695, dated June 9, 1885.

Application filed September 28, 1883. Renewed May 14, 1835. (No model.)

To aZZ whom it may concern.-

Be it known that I, LOUIS GATHMANN, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Upright Centrifugal Flour-Bolts; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters-of reference marked thereon,which form a part of this specification.

This invention relates to centrifugal separators of that class in which the axis of the rot-atin g beater-drum is vertical, and in which the material is fed in at the bottom and the refuse or unbolted portions of the material are discharged at the top.

The primary object of the invention is to provide a construction by which the rate of speed on the part of the material being operated upon is regulated in its passage upward through the machine.

The improvements herein described consist, primarily, inthe combination,with stationary portions of the machine and with the drum carrying the revolving boaters, of stationary blades or wings movably affixed to the inner surfaces of adjacent uprights or stationary parts of the machine, so that by a change in the angle of the inclination of these stationary wings the progress of the material may be accelerated or retarded without a change of the inclination of the heaters or blades upon the drum..

The invention consists, further, in certain features of constructiomwhich will hereinafter be more fully explained, and pointed out in the claims.

In the accompanying drawings, Figure l is an elevation of the machine, having a part of the outer inclosing-wall adjacent to the eye removed, and also a portion of the boltingscreen broken away, to reveal the interior of the machine. Fig. 2 is a central vertical section of the machine in the line a: w of Fig. 3. Fig. 3 is a horizontal section of the machine through 3/ y of Fig. 2. Fig. 4 is a fragmentary central vertical section in the line 2 z of Fig. 3. Fig. 5 is a fragmentary horizontal section enlarged, but otherwise corresponding with that shown in Fig. 3, indicating a construction whereby each of the adjustable blades secured to the uprights of the machine may bev operated or moved by hand. Fig. 6 is a fragmentary horizontal section near the bottom of the machine, or, say, at c, Fig. 4. Fig. 7 is a horizontal section showing a preferred form of the outer inclosing-wall. Fig. 8 is a view of one of the adjustable blades detached, showing a desirable mode of its attachment to the rod which. passes through the frame of the machine and by which said blade is controlled.

A A is a base, composed in this instance of two parallel beams, from the central parts of which rise two parallel uprights, A A, on opposite sides of the machine. Said uprights are connected near the base by cross-beams a a, and at the top by cross-beams A. A are vertical parts secured to the inner surfaces of the uprights A, or in line with the diameter of the drum.

O is a screen, made in two upright partispherical sections or parts, each composed of a skeleton frame having vertical bars 0 and circumferential ribs 0. of this frame is fastened the bolting-cloth or screen proper. The screen-frames are fastened removably by their marginal bars 0 to the posts A by screws cipassing through the said marginal bars into the posts.

Exterior to the screen-cloths are located the spaces D, inclosed by the outer walls, D, which may be constructed of wood or other material, but which are preferably made, as here shown, in skeleton frames, upon which is stretched heavy canvas or similar perforate material, in order that the'bolted substance falling in the chamberDmay be cooled by admission of air through the canvas in the natural action of the machine. The walls D are desirably made removable, so as to give access to the screen, and to this end I prefer the construction shown in Fig. 7, wherein the doors are hinged to the uprights A and meet at their opposite edges, being held by a hook or other suitable fastening.

' Near the base of the structure, and resting on the cross-beam a, is a bottom board, E, either circular or rectangular in form,aocording to the construction of the outer inclosing- To the inner surface,

walls, D, and having a vertical marginal rim, E, of a few inches in depth, forming a receptacle for the bolted material. In this receptacle is provided a discharge-spout, E. (Seen in Fig. 3.)

At the top the machine isinclosed by ahead, E corresponding in shape with the bottom board, E, and having also a rim, E,which depends far enough to form a suitable stop and inner support for the removable outer inclosing walls or doors, D.

. E, either by attachment thereto or byattachment with the posts A. The screen-frames O are continuous with this depending flange and the upper margin of the receptacle F, so asto form a closed chamber, except that through the upper rim vor flange, F", proceeds antoutlet passage or spout, F, for the vdischarge of the material not delivered through the screen. 0. Theupper surfaces of the horizon.- tal ribs 0' of the screen 0 are downwardly beveled, as indicated in Fig. 2, in order to allow the material discharged into the chamber D through the bolting-cloth to descend. without lodgment upon said ribs.

Concentric with the cylindrical screen or bolting-cloth O is located the drum B, which, for the purposes of this invention,may be either cylindrieal,conical,or prismatic in form. Said drum is mounted upon a vertical axial shaft, B, resting in a suitable foot-piece on one of the cross-beams a at the base of themachine, and rising through thesupportiug-block a at the top, being provided with a suitable pulley at either one end or the other, for its rotation by means of a belt leading. from any convenient source of power. The drum B has its ends closed by suitable means,which may also serve to give attachment of the drum to the ner.

Upon the exterior surface of the drum are attached beater blades or wings B. Said beater-blades may be either movable, so as to permit change of their vertical direction, or they may be fixed; but in case they are immovably fastened to the drum an. inclination will preferably be given. them, somewhat as shown in Fig. 1, albeit, by means of devices to be hereinafter described, an effective opera tion of the machine may be. obtained if said drum-beaters are securedin a perfectly vertical position to the drum.

B B are blades arrangedv in a series. upon the inner surfaces of one or both of the posts A. These blades B are pivotally secured at their middle points in the median line of said or desirable manouter or protruding end is provided with means,preferably in the nature of a cross bar or arm, I), by which the rod b may be rotated to give the desired inclination to the blade B. The cross bar or arm b should be secured to the said'rod in the same plane with the blade B within the. machine, iu order that the former may indicate. to the eye the position of the latter. The blades B are desirably of length. equal toor a. little wider than the faces of the parts A", and, in case. they are longer than. the width of said parts, may be cut away at theirends or corners, as indicated, so that when turned in a horizontal direction they will not injure the screen-cloth over which they will then project. Their edges adjacent to the drum may be slightly concaved throughout their length, in order to. conform somewhat with. the. direction of the revolving blades B which. should run as nearly as possible or convenient to the stationary blades.

The adjustable blades B are the means relied on to vary or regulate the progress of the material upward through the machine. Such material will, obviously, bethrown in a tan- IOO gcntial direction from the heaters B bythearevolution of the latter, andthis course of the stufl will, as it strikes the blades B and the face of the post A, carry it longitudinally of said blades B. By setting the latter in. a properly-inclined positiou,-therefore the stufl" will leave theblades at a higher point in the machine than that at which it strikes them.

Encountering the screen after leaving the blades, the stuff rebounds, and is caught by the heaters and is again thrown outward. When it falls upon another ofthe blades B, it is again raised, and ultimately, by a succession of these operations, reaches the top of the machine, whence it is discharged through the spout F. A more or less rapid vertical movement of the stufl. through. the machine will therefore obviously be produced by a variation of the inclination of the blades B, or by rotationof therods b,to which they are attached by means of the external devices,b.

For the purpose of securely setting the said blades at any inclination given. them the pro trudiug parts of the rods 6 may be screwthreaded and provided with set-nuts b, er-

IIO

ranged to bear on. the outer surface, of the frame, as shown in Figs. 2 and 5.

All of. the blades B onone side of the machine may be simultaneously operated' or changed by means of a vertical rod, B, pivotas shown at the right in Fig. 1 and on both sides in Figs. 3 and 4. For the purpose of ally connected with the several lateralarms b,

also holding or securing the entire series of ad justable blades by a single device in this last described construction, B is a bracket securedlto the frame by bolts 6 and provided with a slot, b inthe direction of the arms b, through which slot the connecting rod B passes. For a suitable distance adjacent to and above and below this bracket the said rod is screw-threaded, and is provided with two clamping-nuts, b -one above and one below the bracket? On desiring to lower the rod the upper nut is retracted, the rod is let down, and the lowerlnut is then run up against the bracket. To raise the rod the operation of the nuts is reversed.

Obviously an inclination of the beaters B on the drum will give an upward movement of the material through the machine, and the minimum speed of such movement may be provided for by such inclined position of said beaters, the variable increase of the upward movement being effected by the adjustable inclination of the stationary blades B.

An important advantage of the construction shown is found in the possibility of effecting the regulation desired without opening orstopping the machine.

By reference to Fig. 4 it will be seen that the lower ends of the lowermost drum-beaters B are bent at b, so as to act as scoops running near the bottom of the receptacle F, and thereby lifting the material from said receptacle.

I do not wish to be limited to the particular features of the construction herein shown with respect to the form of the frame or of the drum, since, so far as the frame is concerned, it is only necessary that stationary parts thereof or applied thereto shall be arranged in position to sustain the stationary adjustable blades B. In the accompanying drawings two sets or series of said blades are indicated. There may obviously be only a single series, or more than two, if desired. Said blades need not, also, be arranged in series, as shown, one above the other, but may be set laterally out of line with each other. The construction shown in this respect is, however, favorable to the application of the rod 13 for the simultaneous operation of the blades belonging to a single series.

I claim as myinvention 1. In a centrifugal bolt having a vertical axis and constructed to carry the material upward, the combination, with a rotating drum provided'with beaters, of asurrounding screen and adjustable stationary blades, substantially as described.

2. In a centrifugal bolt having a vertical axis and constructed to carry the material upward, the combination, with a rotating drum provided with beaters, of a surrounding screen, pivoted stationary blades set edgewise to the drum and at a distance from the beaters thereon, and means constructed to adjust the said pivoted blades from the exterior of the machine, substantially as described.

3. In a centrifugal bolt having a vertical axis and constructed to carry the material upward, the'combination, with a rotating drum having beaters thereon, of a surrounding screen, stationary blades set edgewise to the drum, but clear of the beaters thereon, pivoted rods secured to said blades passing through the stationary part of the machine, andmeans exterior to the machine for rotating said rods,

substantially as described.

LOUIS GATHMANN.

Witnesses:

M. E. DAYTON, J ESSE Cox, Jr. 

